Merge pull request #56 from joeshaw/dockerfile-maven-base-image

use maven base image rather than open openjdk

Author: ic0ns

Dockerfile

@@ -1,5 +1,4 @@
-FROM openjdk:8-slim-stretch
-RUN apt-get update && apt-get upgrade -y && apt-get -y install git maven 
+FROM maven:3.6.1-jdk-8
 RUN git clone https://github.com/RUB-NDS/TLS-Attacker.git
 RUN git clone https://github.com/RUB-NDS/TLS-Scanner.git
 WORKDIR /TLS-Attacker/